Description
Invision Community (aka IPS Community Suite) before 4.6.0 allows eval-based PHP code injection by a moderator because the IPS\cms\modules\front\pages\_builder::previewBlock method interacts unsafely with the IPS\_Theme::runProcessFunction method.
References
- https://hackerone.com/reports/1092574
- https://invisioncommunity.com/features/security/
- 20210528 [KIS-2021-04] IPS Community Suite <= 4.5.4.2 (previewBlock) PHP Code Injection Vulnerability mailing-list
- http://packetstormsecurity.com/files/162868/IPS-Community-Suite-4.5.4.2-PHP-Code-Injection.html
- http://karmainsecurity.com/KIS-2021-04